Furnace-door



T. G. AVERILL.

FURNACE 000R.

APPLICATION FILED JAN. 2. ma.

Patented July 29, 1919.

I 4 SHEETS-SHEET I.

T. 6. AVERILL.

FURNACE DOOR.-

arrucmos man um. 2. 19m.

1,31 1,369. Patented July 29, 1919.

T. s. AvEmLL.

Fumucs 90 3'. APPLICATION FILED MN. Z. 19).

Patented July 29, 1919.

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T. G. "AVERILL.

FURNACE 000R, arrucmqy; men m4.v 2.191s.

Ewen/t0 Patented July 29,1919.

4 SHEETS-SHEET 4Q T STATES- rnoms'e. Avnnnm, or onrcne nmnrors.

' run'nncn noon.

7 To all 'iohom it may concern:

Be-it known that I, THo As'G. AVERILL, a citizen of the United States, residing at Chicago, in the county of Cook-and State of Illinois, have invented a certain new and useful Improvement in Furnace-Doors, of which thefollowing is a specification.

This invention relates to improvementsin furnace doors and has for its object to pro-- vide a new and improved construction of this description by means of which the furnace doors .canbe quickly opened and closed without the operator using his hand for that purpose, and so as to permit coal to be thrown into the furnace. The invention is illustrated in. the accompanying drawings wherein, Figure 1 is a view of a device embodied 'inthe invention showing the doors closed.

Fig. 2 is a. sectional view taken on the line 2-2 of Fig. 1. Fig. 3 is a side elevation of the device shown in Fig. 1.

Fig. 4 is a view of the device illustrated in Fig; 1 showing the doors openand with ,the air cylinder disconnected.

Fig. '5 is a view of the'end of one of the doors and the operating mechanism connected therewith.

Fig. 6 is a plan view of the cylinder and leverillustratedin Fig. 5.

Fig. 7 is a, sectional view taken on the Fig. 9is'a view of he. controlling valve.

Fig. 10 is aview showing the valve rod.

1 for the valve shown in Fig. 9.

Fig. 11 is a sectional view showing-one means of connecting the foot, lever with the ig. 12 is airont viewof the parts shown ike numerals refer to like parts throughout the, several figures.

I'haveshown 1n the drawings a construe locomotives. In this construction there are two doorsections 1 and 2. The door section 1 is pivoted at 3 and door section 2 ,at 4 on opposite sides of the opening. These door sections are movedsimultaneously so 1 as to openand permit fuel to be thrown upon the grate. I have provided three-means for opening these door sections, namely, by air,

Specification ef'Letters Patent. "Patented July 29, 1919. miq flon and January 2,1918. 'Ser1al1q'o.209, 849.

at 6. The door section 1 is provided with Y a lug 7, and section2with a lug'8, the lug on one door section overlapping the other door sect on. These lugs, when the door sections are closed, prevent the door sections from being blown out in the event a boiler I flue should burst. The door sections may be made of the same Weight desired, and I provide means for'insuring their closing without slamming. The means illustrated in Fig. 1 to secure this result comp-rises a v connecting piece 5, and its method of connection with the door sections. inoted that the connecting piece 5 is provided with'an engaging piece 9 which projects into a slot-10 in section 2, and with an engaging piece 11 which projects into a slot 12 in a piece oonnecting'with section 1. When power'is applied to section 1 so as to open the sectlons, 1t will be noted that the engaging piece 9 moves farther away from p1vot4 as the door sections open, and closer 'to pivot 3. This increases. the leverage of sectionl and decreases the leverage of sec- The engaging -piece 11 moves 51' tion 2. greater distance than the engaging piece 9 so that the top sectionlwill always have a suflicient leverage 'to cause it toautomatically close when the pressure applied to it is released. As the door sections close the engaging piece 11' moves away from the It will be pivot 3 and the engaging piece 9 toward the pivot 4, thus equalizing the lever arms and without slamming.

This variation in movement of the two connecting points is secured by the position and arrangement of the connecting piece 5. I prefer to provide the piece 5 with ball bearings at the points where they engage the door sections. and the stationary piece behind the door sections. In the construction shown this result is secured by providing the connecting piece 5 with the pinions into which are received the bolts 13 and .14.

These bolts engage the door sections and the part behind the door sections as the door sections are moved so as to. facilitate the 95 'causing the door sections to .come together opening between them. I provide means for adjustin the door sections so as to compensate or wear, the variations in temperature, etc'., so that they may be adjusted to insure the proper closing at all times. "In.

- order to secure this adjustment I connect the pivot 6 with an adjustable-support 15. This support is adjustably' mounted on the rods- 16 and held in place by the nuts 17 and 18, the rods being threaded for these nuts. When it is desired to adjust the door sections, the piece 15 is raised 'orlowered by means of these nuts. It will thus be seen that a fine adjustmentcan be secured so as to insure the proper closing of the door sections. It will be noted that there is a single connecting piece extending'between the door sections and directly connected with them. This construction produces a device with a small number of parts thereby reducing the first cost, and it also produces a-simple construction which operates easily and efficiently and which requires little attention or expense to keep in repair. It will further be noted that the connecting piece,

is located above the door opening, and that there is no cross connecting mechanism below the door sections. This is'of importance in locomotive furnaces because the door' 4 opening in some'furnaces is near the floor and there is little room below the door sec' tions for operating mechanism. It will further be noted that the connecting piece has a direct operative connection with the door sections,'and that this connection is movable as the-door sections open and close. The door sections may be opened by hand bymeans of the lever 19, see Figs. 1, 2 and 3. This lever is pivoted at 20 with a connecting piece 15, and the end 21' thereof engages the fixed part 22 and rides therealongas the lever is moved. It will thus be 'Seen that by moving said lever upwardly the connecting piece 5 would be moved about its pivot so asto open and close the door sections. When the lever 19 is in its maximum open position, the door sections will be held wide open- It is sometimes desirable to provide a small openin between the door sections. This may be one by moving the i I lever 19 up a short distance and then movmg thestop 23 underneath said lever so that it passes between the lever and the connecting piece 5, thereby preventin the lever y from returning to its closed pos tion. This stop is plvoted at 24 to the lever 19 and normally rests on top thereof as illustrated. The door sections may be also 0 ened and closed by air pressure or by the oot of the operator. .The construction for opening by air pressure is illustrated in Figs. 1, 5 and 8 to 10. There is provided for this purpose an air' cylinder 25 which has a piston 26 and a piston rod 27, said rod being connected with'the door 1. cured by a pin 28 which works in a slot 29. The endof the piston rod is preferably bifurcated and the portion of the door section containing the slot 29 passes between these bifurcations as shown in Fig. 3. The pin 28 can be. removed if desired as'where for any reason air cannot be supplied or there is some defect so that the air device does not properly operate. The piston 26 (see Fig. 8) is elongated and is enlarged at its lowered end so as to form a surface 30. There is a space 31'between the portion of the piston and the wallet the cylinder. A valve 32 controls'the admission of the air to tliecylinder 25 and the exhaust of the air therefrom. When the valve. 32 is moved upwardly-it opens the admission port 33 and lets air in beneath the piston 26. The piston is then moved upwardly so as to apply pressure to the door section 1 and open it, and the connecting piece 5 opens the door section 2. The end of the connecting piece connected with door section 1 moves upwardly and the end connected with door. section 2 moves downwardly so that thetwo door sections are moved in opposite directions to open the door. When the valve 32 moves back to its initial position, the exhaust port 34 is opened and the air passes out of the cylinder through the exhaust port 34 and into the opening 35 in the valve and then outthrough the port 36 (see Fig. 8). I prefer to' provide means for slowing down the movement of'the piston hear the limit of. its down stroke. This 'result is secured by arranging the 'port 34 so that it is shut ofl by the piston before the piston reaches the end of its downward movement. The air in the cylinder below the piston, after the port 34 is closed by the piston, then passes out.

through the port 33 to the by-pass 37 and This connection is sechamber of the .valve through the-pipe 39 connected to any suitable source. There is a port 40 which connects with the'space 31 in the cylinder so thatthere is a pressure on the. face, 30 of the piston which produces an unbalanced condition, thereby causing the piston to be moved downwardly when the exhaust port is open. The valve 32 is connected with a rod 41' which projects from the valve casing and which is engaged is returned to its initial position. If, for

, which connects the piston ing said piston by a foot lever 42 pivoted at 43 ,(see Fig. 7). When the operator'places ,his footon theend of the lever 42 he moves the valve 32 upwardly by means of the rod 41, thu's admitting air below the piston and causing the door sections to be opened. When he takes his foot from the lever the valve. 32

any reason, it is desired to open the door sections bymeans of the foot, the pin..2' 8

door section 1 rod from the door section as. shown in Flg. 4. The foot lever 42.- is' provided at its end with a pin 44. which works in an opening in a push rod' 45 "(see Fi 5. and 7). This pin works freelyin this push rod when the door sections arebeing moved by the air cylinder. When the air cylinder is disconnected from the door sections a pivoted stop- 46 (see Fig. .7) is moved.-

into the positlon shown in Fig. 11 so that.

sections, two pivotal connections one .for'.

the pin 44 engages this stop as clearly illustrated in Fig. 11. Under these conditions when the foot lever is moved the pushrod 45 is also moved. This push rod is pro titled with a slot 47 through which a pin 48 connected to a stationary part, passes. The push rod is provided at its upper. end with an engaging face 48 which engages door section 1, as shown in Fig. 1, and'which is arranged so that when the. push rod. is moved upwardly by the foot lever-the point of engagement between it and the door section gradually travels over towardthe pivot of the door section clearly shown in Fig. 4, thus increasing the leverage of the door section 1 so that it will automatically close when the pressure is released.- This con struction also causes a decrease in the travel of thepush rod, that is to say, the fact that the engagement with the push rod travels nearer to the pivot as the push'rod is moved up, gives a greater movement to the vdoor witha less movement of the push rod. When the foot lever is released, the weight of the door moves the parts back to their initial positions.

is moved to the position shown in Fig. 7, and the piston rod 27 connected to the door section by means of the pin 28. The .rod 44 is provided with a cut away portion or notch 44 into which'the projecting point of the stop 46 .is received when thepush rod 7 connected with the, foot lever. A spring 44 keeps the stop. 46 in proper, position at all times. When it is desired to .connect the push rod with the foot lever, it is only necessary to lift up the outer end of the foot lever-so as to lower the rod 44' whereupon the upper end of said rod passes below the projecting part of the stop 46 so that said rod engages said stop as shown in Fig. 11. It will thus be seen that I havedo not 1 shown.

is removed, thus disconnectopposite sides of the door opening, a

1 section to r the .on opposite 1 sections, and

If it is desired. to again move the door section by air the pivoted stop 46 'saiddoor sections, I 'jsaid connecting piece, andjan adjustable-sup: port with which said pivot is connected here a construction which can'be opened by air,- by hand, or by the foot of the operator.

I have struction embodying the-invention, but it is of course evident. that the parts may be varied inflmany particulars without departing from the spirit of the invention as set each door, said pivotal connections being-on single connecting piece extending from ,one door described in-detail a. particular conforth in the claims hereof, and-Itherefcre limit myself to" the 'cons'truct1on I i I 754 v door comprising two door: .1-sections',Itwopivotal connections one for f other and pivoted between its ends, said connection-piece bent so that per.

tions thereof are opposite said door sections,

and ,a direct operative connection betweensaid connecting piece'and said door sections.- 2. A furnace door comprising two door each door, said pivotal connections being sides of the door opening, a single connecting piece extending from one .door section tween its ends, a direct operative connection between said connecting piece and said door means for adjusting saidconnecting piece so as to adjust thetwo door sections with relation to each other to insure the proper closin thereof.

. 3. A furnace sect1ons,two p votal connections one for each of said'door sections, sa1d pivotal connections located on opposite sides of the a single connecting piece l0-- door opening, cated above the door sections and extending across from one door section to the other, said connecting piecdpivotedbetween its ends, said connecting piece bent sothat poroor comprising two door to the other and pivoted betions thereof are opposite said door sections having a direct movable connection with each of said door sections.

sections, each-door, opposite sides of the door connecting piece extending from one door section to the other and above the door sections sa1d connecting piece said pivotal connections being on opening, a single pivoted at 'a point projecting on opposite sides of the door,

p n and a movable connection between the door connecting piece.

5. A furnace sections, pivotal connections for, said door sections, .a connecting piece extending across fromone door section to the other, said conand overlapping the door sections,

1120 sections and the overlapping portions of said door comprising two door i necting piece operatively connected with a pivot for supporting 4 119 V v 4. A furnace Idoor comprising two door f two pivotal connections one for whereby the connecting piece may be ad--. just'ed to adjust the meetlng edges of said door sections.

6. A furnace door comprising two door sections, two pivotal connections one for each door, said ivotal' connections being on opposite sides '0 the door opening, a single section to the other and pivoted between its connecting-piece extending from one door ends, an operative connection between said connecting piece and said door sections, and a lug on each door section which overlaps the other door section when the door sections are closed.

7. A furnace door comprising-two door sections, two pivotal connections one for veach door, said pivotal connections being-on "opposite sides of the door opening, means for applying power to one of said door sec tions, a connection between the two door sections so that they move in unison and means for varying the connecting points between said connection and said door sections as the door sections are opened and closed.

8. A furnace door comprisin two door sections, two pivots one for eac door sec- 'tion, said pivots located on opposite sides of the door opening, a connecting devic'eextending from one door section to the other and connected with both of said door sec tions, and means for automatically varying the points of connection betweensaid connecting device and saiddoor sections as the door sections are opened and closed so as to vary thelever arm of the door sections.

9. A furnace door comprising two door sections, pivots on opposite sides of the door opening and with which said sections areconnected, means for applying power to one of said sections, a connecting plece extending from one section to the otherand' pivoted THOMAS G. AVERILL.

Witnessest 4 I MINNIE M. LINDENAU,

OHRISTINA'DEANS. 

